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Finding the Fourth Proportional to 526.65, 727.03 and 392.39

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Solution

The fourth proportional to 526.65, 727.03 and 392.39 is: 541.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.65 : 727.03 = 392.39 : x
  2. Step 2: Convert to fraction form
    526.65/727.03 = 392.39/x
  3. Step 3: Cross multiply
    526.65x = 727.03 × 392.39
  4. Step 4: Simplify right side
    526.65x = 285,280.77
  5. Step 5: Solve for x
    x = 285,280.77/526.65
  6. Step 6: Final answer
    x = 541.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.